Dissimilar Welding of Si-Mo Ductile Iron Exhaust Manifold Welded to Stainless Steel Catalytic Converter using NI-ROD Filler Metal 44HT 2000-01-0763
The demands of modern society continue to drive automotive design to greater efficiency and cleaner operation at lower cost. Higher operating temperatures are now typically required to meet these demands, making the use of more robust materials and joining techniques a necessity. This paper describes how the benefits of reduced emissions and greater fuel economy along with quieter operation are achieved by using silicon-molybdenum modified ductile iron exhaust manifolds welded to close-coupled 400 series stainless steel catalyst cans. This weldment is made possible by using a newly-developed stabilized Ni-Fe-Mn-Cr-Cb welding wire called NI-ROD® Filler Metal 44HT. Durability testing of fabricated exhaust components under extreme dynamometer testing has shown that this welding material provides successful higher temperature performance by the ductile iron than that provided by previous weldments of the same iron.
Citation: Baker, B., Kiser, S., Chen, P., Skinn, B. et al., "Dissimilar Welding of Si-Mo Ductile Iron Exhaust Manifold Welded to Stainless Steel Catalytic Converter using NI-ROD Filler Metal 44HT," SAE Technical Paper 2000-01-0763, 2000, https://doi.org/10.4271/2000-01-0763. Download Citation
Author(s):
Brian Baker, Samuel Kiser, Peter Chen, Brian Skinn, Rick Williams
Affiliated:
Special Metals Corp., Wescast Foundries, Ltd.
Pages: 12
Event:
SAE 2000 World Congress
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Casting Solutions for the Automotive Industry-SP-1504
Related Topics:
Exhaust manifolds
Catalytic converters
Fuel economy
Welding
Iron
Steel
Fabrication
Joining
Metals
Catalysts
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